Robin Thicke and his brother, fight their father's wife to protect his estate

Actor, Alan Thicke's children, singer, Robin Thicke and his brother Brennan Thicke say they have no choice but to protect their father's legacy from the "avarice and overreaching" of his third wife, Tanya Callau. Brennan and Robin Thicke are co-trustees of their father's living trust and they say they don't have any choice but to file a petition against their father's third wife, in order to protect his legacy and prevent his testamentary intentions from being undermined by her.

Their dad, Alan Thicke died suddenly in December at age 69, after his aorta ruptured while playing hockey with his youngest son Carter.

The Thicke brothers say their father acquired the vast majority of his wealth long before meeting Callau, who signed a prenuptial agreement when they got married in 2005.

In the trust, Thicke left each of his three children equal shares of a Carpinteria ranch, 75 percent of his personal effects and 60 percent of his remaining estate, according to the petition.

He then left his wife, the ranch's furnishings, 25 percent of his personal effects, a $500,000 life insurance policy, all of his death benefits from pensions and union memberships and 40 percent of his remaining estate. He also provided that she could live at the ranch, as long as she paid for its expenses and maintained the property.

Now, the Thicke brothers claim Callau is insisting that the prenup she signed is invalid.

According to the petition filed Tuesday in Los Angeles County Superior Court, Thicke updated his trust from time to time, and the most recent iteration was signed in February 2016, which designated his brother Todd Thicke, as the trustee, and left the estate in the hands of his children if Todd declined the role — which he did.

Brennan and Robin say Callau made no complaints about the prenuptial agreement or the estate plan at that time.

"Now that Alan is dead, Tanya claims there are numerous problems with the Trust and the Prenuptial Agreement". "Tanya asserts that there is no chance the 'Prenup' could withstand legal challenge and that she has very significant community rights in the Trust’s assets and rights of reimbursement with respect to improvements to the Ranch. Tanya also claims 'Marvin rights' asserting that she had to forgo opportunities to pursue and advance her own career in order to support Alan and be his companion and partner, including raising Carter."The Thicke's lawyer, Weingarten also claims Thicke's wife has "threatened to cause a scandal and create bad publicity for the family unless the Co-Trustees agreed to participate in a mediation and giver in to her demands." But the Thickes's have refused to give in to her request.